The Round Table was King Arthur's table where he congregated with his Knights. It is very important part of the legend of King Arthur. Its shape (the fact that it is round and that there is no head) symbolizes that all of Knights siting there have equal status. This table was first described in 1155. by Wace, in his "Roman de Brut". There, he pointed out that Arthur created the Round Table to stop and prevent quarrels among his barons. During the years, the meaning of the Round Table developed, and in the end of 11th century, it had come to represent order of Knights called Knights of the Round Table.
One reason for these added pieces of flourish is because when many of the original world maps were being made, people were very superstitious, and these drawings gave them comfort.<span />
Your answer should be Articles of Confederation and Declaration of Independence, im almost 100% sure :)